The most common and most likely answer to this crossword clue is the 5 letter word GRUNT
I've seen this crossword clue in The Daily Telegraph
G
R
U
N
T
More clues leading to the result GRUNT
- Good little pig producing “oink”
- Adult leaves award for university oink
- Oink and tail of pig, smallest in litter
- Race dominated by car, a fuel-guzzler producing this noise?
- Good little swine — noise from it?
- Noise made by little one after end of feeding
- Noise, note, produced by little pig
- Noise from little pig under pig’s tail
- Great aunt’s hoovering up cream tea with a pig-like sound
Buddy explains!

The straight part
We know that "Noise" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case noise = grunt.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GRUNT mean?
GRUNT noun- A short snorting sound, often to show disapproval, or used as a reply when one is reluctant to speak.
- The snorting cry of a pig.
- Any fish of the perciform family Haemulidae.
- A person who does ordinary and boring work.
- (United States Army and Marine Corps slang) An infantry soldier.
- The amount of power of which a vehicle is capable.
- A dessert of steamed berries and dough, usually blueberries; blueberry grunt.
- (of a person) To make a grunt or grunts.
- (of a pig) To make a grunt or grunts.
- To break wind; to fart.